Fic-ulation on ACD’s “The Yellow Face” and Sherlockian 00Q kidifc.
Sherrinford Holmes always wanted his older brothers’ attention. His skill with technology was a way to impress, and he honed it.
He went to work for Mycroft at MI6, and he tried to pique Sherlock’s interest through John and Sherlock’s blogs. In each of these roles, he worked under a different identity: quartermaster. theimprobableone.
Sherrinford/Q met CIA agent AGRA on a mission. They fell in love. They had a baby: a sentimental, dangerous thing for intelligence agents to do.
Somebody threatened the little family, and they narrowly escaped a fiery death. Like Irene and then Sherlock after them, they took the opportunity to be thought dead. Mycroft kept their secret even from the other Holmeses.
The baby was placed with a governess. AGRA went rogue, seeking revenge. Q went undercover in the organization that had threatened his family, trying to take them down from the inside. Another new name for Sherrinford: Porlock.
Eventually AGRA became Mary Morstan. When Mycroft needed someone to protect John Watson after Sherlock’s fall, he put his eminently capable sister-in-law on the job.
It wasn’t part of the plan for Mary to fall in love with John, but then she’s always been a romantic.
After that, Mycroft kept his distance.
Sherrinford passed Mycroft information on an impending terrorist attack in London, then faked his death again to get out. This time, maybe he didn’t let Mycroft in on the ruse. (Shades of Irene.)
On the cusp of John’s proposal, Mary excused herself to the ladies’ to call Sherrinford with a final goodbye. Just one meeting, Sherrinford begged. For old times’ sake. Maybe, Mary said. I’ll think about it.
In the lead-up to the wedding, Mary couldn’t resist the sentiment of having her son at this significant event, even though he wouldn’t recognize her. She asked his governess to bring him.
Jonathan Small, Archie, and “mum” credited not by name, but by the roles they played:
I see governess hair (compare to Jane Eyre and the Bronte sisters):
Uncle Sherlock and the family resemblance:
But having her son at the wedding might have been a mistake. How much did CAM know?
“Wish your family could have seen this.”
At the wedding reception, Sherlock deduced Mary’s pregnancy. She wanted desperately for it to be John’s, a new life to bless their new life together. But the secret rendezvous with Sherrinford, the surge of the old feelings… Mary realized that she probably had another secret to keep.
Drama ensues: His Last Vow, then series 4. Mary’s secrets, lies, and loves are revealed bit by bit. She and John part ways.
A new Holmes family forms: Mary, Sherrinford, Archie, and baby Violet. (Or: Mary and Sherry get back together and keep spying. The kids are adopted by Molly and Greg. Or John and Sherlock.)
The child that John thought was his daughter remains the daughter of his heart. When he marries Sherlock, she becomes his niece as well.
Or not. But this headcanon has a lot of things I’d pay dearly to see in BBC Sherlock:
John and Sherlock solving cases together from 221B with canonical Johnlock
An eventual happy ending for Mary and baby (“Allowing the Possibility of Mary and Baby”)
Liberal, transformative use of Sherlockian canon (“The Yellow Face,” “The Valley of Fear,” “The Dancing Men”)
So, until there’s a Series 4, this can be my happy-enough place.